Polyester Recycling System and Recycling Method

Abstract

To provide a polyester recycling system including: a functional layer removing means of removing a functional layer from a laminated polyester film including a polyester film having on a surface thereof the functional layer as a recovered waste material, with a cleaning agent dissolving the polyester film; a recovery means of recovering the polyester film, from which the functional layer has been removed; and a production means of producing a recycled polyester product with the recovered polyester film as a raw material.

1 . A polyester recycling system comprising:
 a functional layer removing means of removing a functional layer from a laminated polyester film including a polyester film having on a surface thereof the functional layer as a recovered waste material, with a cleaning agent dissolving the polyester film;   a recovery means of recovering the polyester film, from which the functional layer has been removed; and   a production means of producing a recycled polyester product with the recovered polyester film as a raw material.   
     
     
         2 . The polyester recycling system according to  claim 1 , wherein the production means includes a pellet production means of pelletizing the polyester film, from which the functional layer has been removed. 
     
     
         3 . The polyester recycling system according to  claim 1 or 2 , wherein the cleaning agent contains an alkalinizing agent. 
     
     
         4 . The polyester recycling system according to any one of  claims 1 to 3 , wherein the polyester recycling system further comprises a rinsing means of rinsing out the cleaning agent attached to the polyester film, from which the functional layer has been removed, in the functional layer removing means. 
     
     
         5 . The polyester recycling system according to any one of  claims 1 to 4 , wherein the waste material is a laminated polyester film in a roll form or a bulk form. 
     
     
         6 . The polyester recycling system according to any one of  claims 1 to 5 , wherein the polyester recycling system further comprises an unwinding means or a cutting means, preceding the functional layer removing means. 
     
     
         7 . The polyester recycling system according to any one of  claims 1 to 6 , wherein a roll-to-roll method is applied to the polyester recycling system. 
     
     
         8 . A polyester recycling method comprising: 
 a recovering step (A) of recovering a laminated polyester film including a polyester film having on a surface thereof a functional layer as a waste material;   a functional layer removing step of removing the functional layer from the laminated polyester film, with a cleaning agent dissolving the polyester film;   a recovering step (B) of recovering the polyester film, from which the functional layer has been removed; and   a producing step of producing a recycled polyester product with the polyester film recovered in the recovering step (B) as a raw material.   
     
     
         9 . The polyester recycling method according to  claim 8 , wherein the producing step includes a pellet producing step of pelletizing the polyester film, from which the functional layer has been removed. 
     
     
         10 . The polyester recycling method according to  claim 8 or 9 , wherein the cleaning agent contains an alkalinizing agent. 
     
     
         11 . The polyester recycling method according to any one of  claims 8 to 10 , wherein the polyester recycling method further comprises a rinsing step of rinsing out the cleaning agent attached to the polyester film, from which the functional layer has been removed, in the functional layer removing step. 
     
     
         12 . The polyester recycling method according to any one of  claims 8 to 11 , wherein in the recovering step (A), the waste polyester film in a roll form or a bulk form is recovered. 
     
     
         13 . The polyester recycling method according to any one of  claims 8 to 12 , wherein the polyester recycling method further comprises an unwinding step or a cutting step, preceding the functional layer removing step. 
     
     
         14 . The polyester recycling method according to any one of  claims 8 to 13 , wherein the polyester recycling method is performed by a roll-to-roll method.